All infestations should be treated.
Bed bugs can live in bedclothes, mattresses, bedsprings and frames, soft furnishings and cracks under wallpaper. Although their bite is painless their saliva can cause irritation, swelling and redness. They feed at night or at any time the room is dark and are hard to see.
Treat all hiding places with an insecticide that is designed for bed bugs. Please make sure that you follow the instructions on the label carefully.
There are local and national companies that can also provide a similar service, try searching a local telephone directory book or the Internet for pest control.